Guns N' Roses have thrilled fans with a surprise gig at the Troubadour in West Hollywood - and they had quite the star-studded guest list.

Slash, Duff McKagan, Richard Fortus, and Dizzy Reed reunited for the show, and everyone from Bradley Cooper and Jim Carrey, to Chris Brown and Kate Hudson joined forces to welcome them back.

Officially announcing the gig at 10am PT on their website, tickets were released two hours later at a pop up store at Gibson Brands, the old Tower Records building in Sunset Strip, with fans forming huge queues along the famous LA road for the $10 tickets.

Taking to the stage, they quickly confirmed they're back with a bang - as they hit every note and received streams of praise online.

Bradley pictured at the gig (Image: MONEY$HOT/ Splash News)

Chris Brown enjoyed it too (Image: SPW / Splash News)

One fan wrote: "Guns 'n' Roses are back. Gunners are back. What a day!"

While one added: "Amazing night! Guns N' Roses 23 years after!"

And one wrote: "It's for real, Axl looks amazing, this tour will be off the rails crazy good!"

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Guns N' Roses are back! (Image: Instagram @slash__gunsnroses)

They hit the stage again (Image: Instagram @slash__gunsnroses)

Fans who didn't get to see them on Friday shouldn't be too disappointed though as they also announced a stadium tour kicking off in June 23 and ending in August 22 and visiting 21 cities across the US.

After months of speculation they confirmed they would be going on the road this summer, a post on Facebook read: "Following months of intense rumor, speculation and feverish excitement from rock music fans around the world, Guns N' Roses confirmed today they will embark on a massive North American summer stadium tour as founder Axl Rose and former members, Slash and Duff McKagan regroup for what will be one of the century's most anticipated musical events."